Characteristic features of water dynamics in restricted geometries investigated with quasi-elastic neutron scattering

被引：49

作者：

Osti, N. C. ^{[1
]}

Cote, A. ^{[1
,3
]}

Mamontov, E. ^{[1
]}

Ramirez-Cuesta, A. ^{[1
]}

Wesolowski, D. J. ^{[2
]}

Diallo, S. O. ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Chem & Engn Mat Div, Oak Ridge, TN 37831 USA

[2] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA

[3] Univ Miami, Dept Phys, Coral Gables, FL 33124 USA

来源：

CHEMICAL PHYSICS | 2016年 / 465卷

关键词：

Water diffusion; Porous media; Neutron scattering; HYDRATION WATER; SUPERCOOLED WATER; NAFION MEMBRANES; CONFINED WATER; SLOW DYNAMICS; MOLECULES; PROTEIN; VISUALIZATION; DIFFUSION; SURFACE;

D O I：

10.1016/j.chemphys.2015.11.008

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Understanding the molecular behavior of water in spatially restricted environments is key to better understanding its role in many biological, chemical and geological processes. Here we examine the translational diffusion of water confined to a variety of substrates, from flat surfaces to nanoporous media, in the context of a recently proposed universal scaling law (Chiavazzo 2014) [1]. Using over a dozen previous neutron scattering results, we test the validity of this law, evaluating separately the influence of the hydration amount, and the effects of the size and morphology of the confining medium. Additionally, we investigate the effects of changing instrument resolutions and fitting models on the applicability of this law. Finally, we perform quasi-elastic neutron scattering measurements on water confined inside nanoporous silica to further evaluate this predictive law, in the temperature range 250 <= T <= 290 K. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：1 / 8

页数：8

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